Thermostat.



'sneiimosism Specification of Letters Patent.

Ptit-enten Api. 4e, i6.,

Application filed Juy G: i911 Ey'. Serial No. 38,2433.

To all fnl/fiom t may Concern.'

Be it known that I, GEORGE E. WHT, e citizen of the United States, residing in the city and count),7 of Sen Francisco and State of Cniifoinia, have invented new and usei'ui Improvements in Thermostats, ot which the following is a specification.

This linvention relates to a 'thermostat -Votive.

One of the objects of the present invention is topi-Ovide e thermostat and Valve whereby the tiow of gas, oiiorstenrn used for heating puiposesmay he regulated to maintain an even tempeieture in the medium being heated.

Another object of the invention is to im prove and simplify the construction of the valve and thermostat so as to increase the eiiciency and 'reiiahiiity of the mechanism and aiso' to reduce the oost of insteiietion and manufacture. Y

Further objects willi heieineftei appesi.

The invention eonsists in the pantsand thev construction enti coinbinatoin of ports as hereineftei' more uiiy described end cieimed, iniving reference tothe accompanying drawings in Which-0 Figure 1 is a side eievation of :twatei tank, showing the application oi the invention. 2 is a contrai, iongituciinai seetion thi-engi; the Vaive enti thermostat. .d ig. 3 is e Cross section on iine 3-3, Fig. 2.

j Referring to the drawings in tietiii, A. indicates e veive casing in which is siitiabiy mounted a double sented balanced voive 2.

Thisveive is norinaiiy heiri in cioseci position by means of a coii spring 3,end is provided on the opposite end with a' rode; by which it may be openedi thronfhineons of' n thermostat oontxoi genereliy indicated :it B, which is constructed os follows: The thermostat controi consists of an expansion tnhe 5., one end oi which is ciosed b V snit ahie means es e. cop 6. The opposite or outer enti of `the 'expansion tube is screwed into'e threaded socket extension formed on s suppoiting bracket 8, and this extension is also provided with extei'nni threads 9., permitting the device as i Whoife. to he soieweci into o. fitting 10 seenrefi on the side of e teni: or boiiei7 such as indicated nt 11. H the tank contains water to `1oe heated. it will readily be seen that the expnsion tube will he submerged in the witter and acc-ordingiy oe subjected to the tenipemtuse ot suine. .Secured in oop (i, :is it i12, is :i rod 13, the opposite enti oi Wi extends through and is ieeiy'niovehie in the or S, thus ioi'lning o ineens :tor snppoi'ti= the rod eentiaiiy with relation to the expansion tube 13, interior of which it is mounted. In some instances, the rod with connecte@v es pension tube 5 is of Considerable length. @ne or more spaceis of sgidei' shape such in-A dicated et 1% is then employed to hohi the rod in n cent-121i position interior oi the tnhe. in ectnai practice, the vaive casing is connected with :L soin-ce of steam supply, hv ineens of e pipe 15 and the opposite sifie oit the vaise is eonneoteci iw means of a 'pipe 16, with :i heating eoii 1.7? mounted interim: -ot the tank or hoiiei: 11. The steam thus vgasses through waive it. with connected if e and coii if?, in this manner hosting the Weten. to any desiieii temilieiotnre, tempo ture being ieguinteii by inconso the therinostat, comprising the expansion tuhe ,i enti roti 3.3. in othei` woiois, it oeeonies necessary to provide, ineens tot eonnectinff the voiveWith rod 1 3, in such o manner that the ooket valve will open when the temperature of. the

water reaches e certain piieiietermineci degrae, and similarly eiose when the desired temperature has been obtained'. This is accoinpiished by fox'n'ing' ai centini opening 18 in the ontei" end ot the Yori thi'oiigh 'hich theinnei' thi-ended enti of i-ooi i extends. enti, by providing.r a nut 19 on the i'oti, 'which may he turned into e position where it wiii engage the end oi the ioci heing'iociior in this position hy menus of i goin nut Q0.

The voperation Wiii then he :is oiiows: .Vvihen the Wotan in tank ii isl Cool` the expansion tube 5 will he so contracted :is to move the rod 13, not 19 und rod i in the dii'eotion ot arrow (i to ii pos `'on Where the valve 2 wiii oe open. thospei'niitting stoom to pass through the mite. pipe i6 and coil 17. rThe noter wiiiin this inaniiei hef-,onse

gn'minoiiy heated, and Wiii after' zi Ceionin time interval hos passed giodlmiiy ohtnni the desired or predetermined tompeziutme,

.the increase in temperature causing the ex pension tube 5 to oi'iidnoiiy expand, Causing roti. 13 to nieve in the direction otmrow i), oi away vEiom nut 19 and rod 4. 4'iihe mim 2 Wiii then Abe noted on oy the eoii spring 3 and Wiii gl'adliaiiy move toward its seat, and

f will nally close when the desired temperaj automatically tube ture has been obtained. Any reduction of4 the temperature in the water will cause the y expansion tube topai'tly contract anrirfwill a corresponding ainqnt.-

then open valve 2 l The desired temperature is in this manner l maintained. If it is desired to increase or onlygnecessary to loosen the jam nut and turn nut 19 in one direction or the other.

`For the purpose of preventing any expansion of rod 13, it is desirable to maintain the temperature interior of the expansion 5 as uniform and low as possible. This is accomplished in the present instance, by providing a plurality of Ventilating openings 22, through which the air can freely circulate to prevent any variation of tempei'ature, as far as rod 13 is concerned.

Bod 13 is in this manner prevented from expanding or contracting, and will consequently not counteract any expanding or contracting tendency as far, as tube 5 is concerned. In the present instance a double seated balanced valve 2 has been provided,

this is of considerable importance, as a very slight opening of the valve will permit a considerable volume of steam to pass through the casing. The valve casing A is also provided wit a by-pass opening 24, and with a controlling valve 25 which closed if the 'main automatically operating valve 2 should stick or otherwise fail lto operate.

The device as a whole constructed as here v shown, is simple, reliable and compact in decrease the temperature it ishtion of the parts against which the end of the thermostatic may be opened or not wish to limit myself to the specific de- 'sign and construction here shown.

Having thus described my invention, what I claim and desire to secure by Letters Patent is-'y 1.' In combination With a bracket, a slidable valve carrying rod disposed longitudi nally of the bracket and supported at its outer end from the latter, a thermostatie rod disposed longitudinally of the bracket and being alined with'said valve rod, said thermostatic rod having a socket inits inner end and the inner end of the valve rod being threaded and freely and directly received in said socket so as to be supported by and-to slide inY the latter without turning the valve rod, anda nut mounted on said threads of the valve rod and between the ends of the, latter so as to be capable of adjustment without movement of the theimostatic rod and abutting at`one end the inner end, of the thermostatic rod throughout operative posiand acting as an abutment rod presses 1n unseating the valve.

2. The combination with a bracket having a socket on one end extending inwardly and outwardly thereof, the inner end of the socket being provided with an ape tured end wall and the outer end threadedy vided with an annular series of Ventilating openings between `the bracket and thev threaded portion, an expansion tube threaded at one end to the socket and having its opposite end closed, a rod in the tube connected to the closed end thereof and having its free end slidably projecting through the. aperture of the socket end wall, the free end of the rod being foi-ined with an axial opening, a valve casing on the opposite end of the bracket, a valve in the casing, anda rod for un'seating the valve having one end entei-ed in the axial opening of the lirst rod.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

' GEORGE E.` WITT. Witnesses v W. W. HEALEY, M. E. EWING. 

